The EFL Cup is the name given to the Football League Cup in England which is open to all football clubs in the Football League. As of 2013, the Football League Cup has run for 53 uninterrupted seasons and gone through many name changes as the competitions sponsors have changed, including: The Milk Cup, The Coca Cola Cup and the Capitol One Cup.
Much like the FA Cup, the competition is played via a knockout basis, however, unlike the FA Cup, only the 92 teams of the professional football league can enter the competition. The attraction for clubs is the winning club qualifies for the UEFA Europa League competition. However, if the winning club have already qualified for the Champions league via their league position then the Europa League spot goes to the next highest placed team in the English Premier League.
The English game has three major domestic trophies any one team can pursue; however, with its relatively low prize money (when compared to the Champions League, FA Cup and a league title) the Football League Cup is often seen as lower priority to the major clubs. So much so that some of the top flight clubs have sent out youth team players to lower league opposition and lost the game.
However, for the teams in the bottom half of the English Premier League the Football League Cup represents an opportunity to enter a European competition and the lucrative pay day that represents.